clear all;close all;clc;
%-- Enter weight matrix of the graph
W =
G.W = W;
G = gsp graph default parameters(G);
G.plotting.vertex size = 100;
G.coords = [0,0;2,2;3,-1;5,1;4,3;]
G.plotting.limits = [-1,6,-2,4];
%-- Define a Graph Signal here
f =
%---Graph Spectrum
Gf = gsp compute fourier basis(G);
paramplot.colorbar = 1;
%plotting the signal (color coded)
figure;
gsp plot signal(G,f,paramplot);
set(gca,'fontsize',20)
title('Graph signal (color coded)');
%plotting the signal (sticks)
figure;%gplot(G.A,G.coords,'-or');hold on;box off;axis off;%title('ND signal on ER Graph');
gsp plot graph(G);hold on;box off;axis off;title('Graph signal (sticks)');
for m=1:G.N
plot3([G.coords(m,1),G.coords(m,1)],[G.coords(m,2),G.coords(m,2)],[0,f(m)],'b','linewidth',3);
end
view([25,45]);
%Plotting spectrum of the graph signal
f hat = gsp gft(Gf,f);
figure;
gsp plot signal spectral(Gf,f hat);
title('Spectrum of the graph signal');
set(gca,'fontsize',20);
xlabel('$\lambda \ell$','Interpreter','LaTex','FontSize',20);
ylabel('$\hat{f}(\lambda \ell) $','Interpreter','LaTex','FontSize',20);